Tool post



P. LUSTRIK Dec. 19, 1944.

TOOL POST Filed Feb. 15, 1943 INVENTOR.

Patented Dec. 19, 1-944 UNITED STATES PATENT OFFICE TOOL POST I Peter Lustrik, Cleveland, Ohio Application February 15, 1943, Serial No. 475,919

1 Claim.

commodate the support of tool bit holders or tools of various widths, a clamping structure which can be readily adapted for use in machines having different T-slot specifications and a clamping foot construction which is designed to avoid injury to the compound rest, table or platen of the machine.

Other objects and advantages more or less ancillary to the foregoing and the manner in which all the various objects are realized will appear in the following description, which comsidered in connection with the accompanying drawing, sets forth the preferred embodiment of the invention.

Referring to the drawing:

Fig. l is a plan view of the improved tool post including a fragmentary portion of one of the members of a compound rest;

Fig. 2 is a side elevational view of the tool post illustrated in Fig. 1;

Fig. 3 is a vertical sectional view thereof, the section being taken on a plane indicated by the line 3-3 in Fig. 2; and

Fig. 4 is an end'elevational view of the tool post.

Referring first to Fig. 3, the tool post comprises a column l formed with an integral rectangular base or foot ll machined for sliding engagement within the-T-slot of a compound rest I2 of a lathe or table of a similar machine. The free end of the column is drilled and tapped for the reception of a cap screw l3 formed with an enlarged head constituting a shoulder to arrest the upward movement of a sleeve l4 telescopically engaged with the column Ill. The sleeve is provided with an overhanging boss l5 drilled and tapped to receive a set screw l6 disposed for engagement with the shank of a cutting tool or a tool bit holder ll of conventional form. The cutting tool is supported upon a block l8 having an arcuate face therein which is adapted for rocking engagement within a curve eat of complemental configuration in a plate IS. The plate, as shown in Fig. 3, is bored for telescopic engagement with the column In and is preferably of rectangular form in order to provide a substantial-bearing surface for engagement with the face of the machine table or compound rest. The plate I9 is provided with a dowel pin 20 engageable within an opening 2| in the sleeve ID to prevent independent rotation of the sleeve and plate during angular adjustments of the tool."

In operation after the tool is seated upon the block l8 and suitably elevated relative to the work through the medium of the block [8 the set screw IGmay be tightened, the clamping action being obtained by the tensive effort upon the foot II, the upward thrust of the sleeve I4 against the head of the cap screw l3 and the compressive. effort between the tool l1, tool block it and plate l9.

It will be noted that the rectangular foot I! will provide substantial bearing against the faces of the flanges defining the T-slot, that the lineal side walls of the foot will prevent rotation of the column and that the localized wear customary in tool posts having circular bases is thus avoided. It will be further noted that the structure embodying the present invention is formed, as shown in Fig. 4, to permit the column to be adjusted in close proximity with the end of the compound rest, in order to facilitate the adjustments of the tool relatively close to the chuck or face plate and the support of the tool while so adjusted with the clamping screw adjacent the cutting edge thereof. It will be recognized that the open sided tool post structure facilitates the use of tools or tool holders of various widths and also accommodate the ready insertion, removal or adjustment of the tool through manipulation of the single set screw "5. When it is desired or necessary to use the improved tool post in machines having a T-slot of diiferent size a new column may be readily substituted in the assembly, the other elements of the organization being interchangeable therewith. In the event the tooling requirements necessitate the elevation of the cutter beyond the limits provided by the height of the shoulder formed by the screw l 3, a new screw formed, with a shank of suitable length and a flanged head portion may be used in place of the screw illustrated herein.

Although the foregoing description is necessarily of a detailed character, in order that the invention may be completely set forth, it is to be understood that the specific terminology is not intended to be restrictive or confining, and that various rearrangements of parts and modifications of detail may be resorted to without departing from the scope or spirit of the invention as herein claimed.

I claim:

A tool post comprising a column, a rectangular foot thereon formed for engagementwith a T- slot in a machine part, a sleeve having a counterbore in the upper end thereof, mounted for rotative and vertical adjustments on said column, a screw in the upper end of said column, a flange slot in the face thereof mounted for pivotal movement on said column, a dowel pin in said plate engaged with said sleeve, a tool supporting block mounted for rocking movement in the arcuate slot in said plate, an overhanging boss in said sleeve having a tapped opening therein, the axis of said opening being disposed in vertical alignment with the center of said arcuate slot, and a cap screw in said boss disposed in axial alignthereon seated in said counterbore and flush with 19 ment with the center of said arcuate slot.

the top of said sleeve, a plate having an arcuate PETER LUSTRIK. 

